package com.atguigu.springcloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.atguigu.springcloud.entity.CommonResult;
import com.atguigu.springcloud.entity.Payment;
import com.atguigu.springcloud.alibaba.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
@Slf4j
public class CircleBreakerController {

    private static final String SERVICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
//    @SentinelResource(value = "fallback")//没有配置
//    @SentinelResource(value = "fallback",fallback = "handlerFallback") // fallback 只负责业务异常处理
//    @SentinelResource(value = "fallback",blockHandler = "blockHandler") // blockHandler只负责sentinel控制台配置违规
    @SentinelResource(value = "fallback",fallback = "handlerFallback",blockHandler = "blockHandler",
            exceptionsToIgnore = {IllegalArgumentException.class})
    public CommonResult<Payment> fallback(@PathVariable("id")Long id){
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/" + id, CommonResult.class, id);
        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException,非法参数异常...");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException,该ID没有对应记录,空指针");
        }
        return result;
    }

    public CommonResult<Payment> handlerFallback(@PathVariable("id")Long id,Throwable e){
        Payment payment = new Payment(id, "null");

        return new CommonResult<>(444,"兜底异常handlerFallback,exception内容 "+e.getMessage(),payment);
    }

    public CommonResult<Payment> blockHandler(@PathVariable("id")Long id,BlockException e){
        Payment payment = new Payment(id, "null");

        return new CommonResult<>(445,"blockHandler-sentinel限流,无此流水:blockException "+e.getMessage(),payment);
    }

    //========OpenFeign
    @Resource
    private PaymentService paymentService;

    @GetMapping(value = "/consumer/openfeign/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
        return paymentService.paymentSQL(id);
    }


}
